The first Paris-Southeast Asia Conference in Mathematical Finance will be held in Siem Reap. The aim of this conference is to enhance existing connections and foster new collaboration between researchers from our teams in Paris and Southeast Asia in the fields of financial mathematics, quantitative finance, stochastic control and risk management. This conference is co-organised by Mathematical Finance teams at LaMME - University of Evry and ENSIIE, Centre for Quantitative Finance - National University of Singapore, and LPMA - University Paris Diderot, in partnership with Institute of Technology of Cambodia.